Specific gravity
Specific gravity is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2013, 2019). Below are those real questions with their correct answers and explanations.
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Real questions that test this
खालील धातू विचारत घ्या. (a) प्लॅटिनम (b) सोने (c) तांबे (d) शिसे चढत्या धनतेनुसार त्यांची क्रमवारी लिहा : Consider the following metals : (a) Platinum (b) Gold (c) Copper (d) Lead Their correct arrangement in the increasing order of density is :
(a)प्लॅटिनम / Platinum
(b)सोने / Gold
(c)तांबे / Copper
(d)शिसे / Lead
Platinum has the highest density among the given metals, followed by gold, lead, and copper. Arranging them in increasing order gives copper, lead, gold, and platinum.
कोष्टकात दिल्याप्रमाणे घनता असणाऱ्या सोन्यापासून आणि तांब्यापासून जर 0.50 kg. च्या समान वजनाचे दोन गोळे (चेंडू) बनवले तर / According to densities given in the table, if we prepare two spheres out of Gold and Copper each of a similar weight of 0.50 kg., then (सारणीतील घनता / Densities from the table: सोने / Gold = 19.30 g/cm³, तांबे / Copper = 8.96 g/cm³.)
Density equals mass divided by volume (Density = Mass / Volume). Since gold has a much higher density than copper, for the same mass (0.50 kg), gold will occupy less volume, meaning the golden sphere is smaller.